body {
  /*background: -webkit-linear-gradient(-152deg, #307c95, #3b2b6a);
  background: linear-gradient(-152deg, #307c95, #3b2b6a);*/
  position: relative;
  height: 100%;
  font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
}

.mask {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 2;
  opacity: .9;
}

.nav {
  position: absolute;
  left: 80px;
  width: 200px;
  height: 200px;
  top: 50%;
  margin-top: -100px;
  z-index: 5;
}

.nav>ul>li {
  list-style: none;
  cursor: pointer;
  position: relative;
  margin-top: 30px;
}

.nav>ul>li::before {
  content: ' ';
  position: absolute;
  display: block;
  width: 0px;
  height: 0px;
  padding: 0px;
  border-radius: 50%;
  border: 2px solid #a6a6aa;
  top: 23px;
  left: -30px;
}

.nav>ul>li>a {
  transition: .8s;
  opacity: 0;
  line-height: 50px;
  font-size: 16px;
  font-weight: bold;
  filter: blur(10px);
  text-decoration: none;
}

.nav>ul>li.active>a {
  opacity: 1;
  color: white;
  filter: blur(0px);
}

.nav>ul>li.active::before {
  padding: 5px;
  top: 18px;
  left: -35px;
  border-color: white;
}

.nav>ul:hover a {
  opacity: 1;
  color: #646464;
  filter: blur(0px);
}

.nav>ul>li:hover>a {
  color: white;
}

.nav>ul>li:hover::before {
  padding: 5px;
  top: 18px;
  left: -35px;
  border-color: white;
}
/**/

.navBlack {
  position: absolute;
  left: 80px;
  width: 200px;
  height: 200px;
  top: 50%;
  margin-top: -100px;
  z-index: 5;
}

.navBlack>ul>li {
  list-style: none;
  cursor: pointer;
  position: relative;
  margin-top: 30px;
}

.navBlack>ul>li::before {
  content: ' ';
  position: absolute;
  display: block;
  width: 0px;
  height: 0px;
  padding: 0px;
  border-radius: 50%;
  border: 2px solid #a6a6aa;
  top: 23px;
  left: -30px;
}

.navBlack>ul>li>a {
  transition: .8s;
  opacity: 0;
  line-height: 50px;
  font-size: 16px;
  font-weight: bold;
  filter: blur(10px);
  text-decoration: none;
}

.navBlack>ul>li.active>a {
  opacity: 1;
  color: white;
  filter: blur(0px);
}

.navBlack>ul>li.active::before {
  padding: 5px;
  top: 18px;
  left: -35px;
  border-color: white;
}

.navBlack>ul:hover a {
  opacity: 1;
  color: #646464;
  filter: blur(0px);
}

.navBlack>ul>li:hover>a {
  color: white;
}

.navBlack>ul>li:hover::before {
  padding: 5px;
  top: 18px;
  left: -35px;
  border-color: white;
}

.mouse {
  z-index: 3;
  position: absolute;
  bottom: 50px;
  width: 40px;
  left: 50%;
  margin-left: -20px;
}

.mouse-wheel {
  position: absolute;
  width: 8px;
  top: 0px;
  left: 50%;
  margin-left: -4px;
  animation: mouse-wheel 2s 2s infinite;
}

@keyframes mouse-wheel {
  0% {
    opacity: 0;
  }
  50% {
    -webkit-transform: translateY(20px);
    transform: translateY(20px);
    opacity: 1;
  }
  100% {
    -webkit-transform: translateY(60px);
    transform: translateY(60px);
    opacity: 0;
  }
}

.banner {
  transition: 3.5s;
  position: absolute;
  z-index: 4;
  opacity: 0;
  max-width: 500px;
  top: 50%;
  left: 50%;
  filter: blur(100px);
}

.banner.json-0 {
  margin-left: -30%;
  margin-top: -64px;
}

.banner.json-1 {
  margin-top: -64px;
}

.banner.json-2 {
  margin-top: -27px;
  margin-left: -35%;
}

.banner.json-3 {
  margin-left: -210px;
  margin-top: -300px;
}

.banner.json-4 {
  width: 300px;
  margin-left: -150px;
  margin-top: -330px;
}

.banner.active {
  opacity: 1;
  filter: blur(0px);
}

.qr-img {
  transition: 1s;
  filter: blur(10px);
  opacity: 0;
  position: absolute;
  bottom: 50px;
  right: 50px;
  z-index: 4;
  cursor: pointer;
}

.qr-img img {
  width: 80px;
  position: relative;
  z-index: 4;
}

.qr-img.active {
  opacity: 1;
  filter: blur(0px)
}

.qr-img.active .line {
  position: absolute;
  top: 5px;
  left: 5px;
  right: 5px;
  height: 2px;
  background: white;
  opacity: .75;
  z-index: 3;
  animation: qr-img-line 2s infinite;
}

@keyframes qr-img-line {
  0% {
    top: 5px;
  }
  100% {
    top: 75px;
  }
}